/* Linked Art in C#: an editorial, typographic look. One grotesque face, near-black on paper, one warm accent,
   category labels over titles, thin rules and air. Cues from the Barbican and Bureau for Visual Affairs sites. */

:root {
  --paper: #ffffff; --ink: #1a1a1a; --text: #33353a; --muted: #6b6e75;
  --rule: #d9d9d9; --rule-strong: #1a1a1a; --panel: #f2f2f2; --tint: #f8e4d9;
  --accent: #d14900; --accent-ink: #ffffff;
  --ok: #20882a; --warn: #946f2e; --bad: #b8321f; --info: #017e9d;
  --font: "Figtree", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #121315; --ink: #f2f2f2; --text: #e2e3e6; --muted: #9a9ca3;
    --rule: #2b2d31; --rule-strong: #e6e6e6; --panel: #1c1e22; --tint: #3a2316;
    --accent: #ff7a3d; --accent-ink: #121315;
    --ok: #4ac26b; --warn: #e3b341; --bad: #ff8577; --info: #5fb7d4;
  }
}

* { box-sizing: border-box; }
html { font: 17px/1.5 var(--font); color: var(--text); background: var(--paper); -webkit-text-size-adjust: 100%; }
body { margin: 0; }
a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
code, pre, kbd { font-family: var(--mono); font-size: 0.92em; }
pre { background: var(--panel); padding: 1rem 1.25rem; overflow: auto; max-height: 70vh; margin: 0.75rem 0 1.5rem; }
pre code.hljs { background: transparent; padding: 0; }
p { margin: 0 0 1rem; }
q { quotes: "\201C" "\201D"; }
small { font-size: 0.85em; }

/* ---- masthead ------------------------------------------------------------------------------------------------ */
header.top { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.75rem 2rem; padding: 1.5rem 1.5rem 1rem; border-bottom: 1px solid var(--rule-strong); }
header.top .brand { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }
header.top nav { display: flex; flex-wrap: wrap; gap: 0 1.5rem; }
header.top nav a { text-decoration: none; font-weight: 500; padding-bottom: 0.2rem; border-bottom: 3px solid transparent; }
header.top nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
header.top .search { margin-left: auto; }
header.top input[type=search] { min-width: 20rem; }

main { max-width: 1200px; margin: 0 auto; padding: 2.5rem 1.5rem 5rem; }
footer { border-top: 1px solid var(--rule-strong); color: var(--muted); padding: 1.5rem; font-size: 0.9rem; }
footer p { max-width: 1200px; margin: 0 auto; }

/* ---- type ---------------------------------------------------------------------------------------------------- */
h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); font-weight: 800; line-height: 1.02; letter-spacing: -0.025em; color: var(--ink); margin: 0 0 1.25rem; }
h1 code { font-size: 0.8em; font-weight: 500; letter-spacing: 0; }
h2 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.01em; color: var(--ink); margin: 3rem 0 1rem; padding-top: 0.75rem; border-top: 1px solid var(--rule-strong); }
h3 { font-size: 1.1rem; font-weight: 700; color: var(--ink); margin: 1.5rem 0 0.5rem; }
.snippets h4 { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 1.25rem 0 0.4rem; }
.snippets pre { margin: 0 0 0.5rem; }
.snippets p.muted { font-size: 0.9rem; margin: 0 0 0.5rem; }
.lede { font-size: clamp(1.15rem, 1.8vw, 1.45rem); line-height: 1.35; max-width: 46em; color: var(--text); margin-bottom: 1.5rem; }
.muted { color: var(--muted); }
.meta { color: var(--muted); font-size: 0.95rem; }
.crumbs, .label { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 1rem; }
.crumbs a { text-decoration: none; color: var(--muted); }
.crumbs a:hover { color: var(--accent); }
.crumbs code { text-transform: none; letter-spacing: 0; font-size: 1em; }
.ok { color: var(--ok); font-weight: 600; }
.diff { color: var(--bad); font-weight: 600; }

/* ---- hero (home) --------------------------------------------------------------------------------------------- */
.hero { background: var(--tint); padding: 3rem 2rem 2.5rem; margin: -2.5rem -1.5rem 2.5rem; }
.hero .lede { margin-bottom: 0; }
.hero a { color: var(--ink); }

/* ---- controls ------------------------------------------------------------------------------------------------ */
input, select, textarea { font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--rule-strong); border-radius: 0; padding: 0.55rem 0.75rem; }
input:focus, select:focus, textarea:focus, button:focus { outline: 3px solid var(--accent); outline-offset: 1px; }
button, a.button { font: inherit; font-weight: 600; color: var(--paper); background: var(--ink); border: 1px solid var(--ink); border-radius: 0; padding: 0.55rem 1rem; cursor: pointer; text-decoration: none; display: inline-block; }
button:hover, a.button:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary, a.button { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary:hover, a.button:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.forms { display: inline-flex; margin-left: 0.75rem; vertical-align: middle; border: 1px solid var(--rule-strong); }
.forms .form { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; padding: 0.2rem 0.65rem; color: var(--ink); background: transparent; border: 0; border-radius: 0; cursor: pointer; }
.forms .form + .form { border-left: 1px solid var(--rule-strong); }
.forms .form.active { color: var(--accent-ink); background: var(--ink); }
.forms .form:hover:not(.active) { background: var(--tint); }
.code-forms p.muted { font-size: 0.9rem; margin-top: -0.75rem; }
button.copy { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; padding: 0.2rem 0.55rem; margin-left: 0.6rem; vertical-align: middle; color: var(--ink); background: transparent; border-color: var(--rule-strong); }
button.copy:hover { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
button.link { border: none; background: none; color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 2px; padding: 0; font-weight: 500; }
button.link:hover { color: var(--accent); background: none; }
form.inline, form.playground, form.filters { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1.5rem 0 1rem; }
form.playground input[type=text] { flex: 1 1 28rem; font-size: 1.2rem; padding: 0.7rem 0.9rem; }
.inline-form { display: inline; }

/* ---- stats and section cards (home) -------------------------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 1.5rem 2rem; margin: 2rem 0 1rem; }
.stats div { border-top: 2px solid var(--ink); padding-top: 0.6rem; }
.stats strong { display: block; font-size: 3rem; font-weight: 800; line-height: 1; letter-spacing: -0.03em; color: var(--ink); }
.stats span { display: block; margin-top: 0.4rem; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
ul.sections { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 1.5rem 2rem; }
ul.sections li { border-top: 2px solid var(--ink); padding: 0.7rem 0 0.25rem; display: grid; grid-template-columns: 1fr auto; gap: 0.2rem 1rem; align-items: baseline; }
ul.sections .label { grid-column: 1 / -1; margin: 0; }
ul.sections a { font-size: 1.2rem; font-weight: 700; text-decoration: none; }
ul.sections a:hover { color: var(--accent); }
ul.sections .count { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 0.9rem; }
.meter { grid-column: 1 / -1; display: block; height: 3px; background: var(--rule); margin-top: 0.5rem; }
.meter span { display: block; height: 100%; background: var(--accent); }

/* ---- tables -------------------------------------------------------------------------------------------------- */
table { width: 100%; border-collapse: collapse; margin: 1rem 0 2rem; font-size: 0.95rem; }
th { text-align: left; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); padding: 0 0.6rem 0.5rem 0; border-bottom: 2px solid var(--ink); }
td { text-align: left; vertical-align: top; padding: 0.6rem 0.6rem 0.6rem 0; border-bottom: 1px solid var(--rule); }
table.corpus tr.fail td { background: color-mix(in srgb, var(--tint) 55%, transparent); }
ul.failures { margin: 0.25rem 0 0; padding-left: 1rem; font-size: 0.85rem; color: var(--bad); }
.pager { display: flex; gap: 1.5rem; justify-content: center; margin: 1.5rem 0; }

/* ---- labels and tags ----------------------------------------------------------------------------------------- */
.status { display: inline-block; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.2rem 0.5rem; color: #fff; background: var(--muted); vertical-align: middle; white-space: nowrap; }
.status-validated, .status-parsed { background: var(--ok); }
.status-siteissue, .status-notcached, .status-partial, .status-undated { background: var(--warn); }
.status-mismatch, .status-missing, .status-unparsed { background: var(--bad); }
h1 .status { font-size: 0.85rem; vertical-align: middle; margin-left: 0.5rem; }
.tags { line-height: 2.2; }
form.advise textarea { width: 100%; box-sizing: border-box; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.95rem; line-height: 1.4; }
.advice td.num, .advice th.num { text-align: right; font-variant-numeric: tabular-nums; }
.advice td.egs q { margin-right: 0.75rem; }
.advice tr.zero { color: var(--muted); }
.advice tr.zero td.egs { display: table-cell; }
.recommendations li { margin: 0.4rem 0; }
.samples a.more { margin-left: 0.5rem; font-weight: 700; }
nav.sample-nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; margin: 1rem 0 2rem; font-size: 0.9rem; }
nav.sample-nav .count { color: var(--muted); margin-left: 0.25rem; font-variant-numeric: tabular-nums; }
section.samples-section { margin-top: 2.5rem; }
section.samples-section p.intro { max-width: 60rem; }
table.samples td.years { white-space: nowrap; font-variant-numeric: tabular-nums; }
.cloud { line-height: 2.4; margin: 1.5rem 0; }
.cloud .tag { font-size: 1.05rem; padding: 0.15rem 0.8rem; margin-right: 0.5rem; }
.idioms { list-style: none; padding: 0; margin: -0.75rem 0 1.5rem; font-size: 0.9rem; color: var(--muted); }
.idioms li { margin: 0.35rem 0; }
.idioms a.term { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); text-decoration: underline dotted; text-decoration-color: var(--muted); text-decoration-thickness: 1px; text-underline-offset: 3px; margin-right: 0.35rem; }
.idioms a.term:hover { color: var(--accent); text-decoration-color: var(--accent); }
section.idiom { margin-top: 2.5rem; }
section.idiom .meta code { margin-right: 0.5rem; }
.tag { display: inline-block; background: var(--panel); padding: 0.05rem 0.6rem; margin: 0 0.35rem 0.35rem 0; text-decoration: none; font-size: 0.9rem; }
.tag:hover { background: var(--tint); color: var(--ink); }
.tag .count { color: var(--muted); margin-left: 0.35rem; font-size: 0.8em; }
.samples a { margin-right: 1rem; }
.notice { background: var(--tint); border-left: 4px solid var(--accent); padding: 0.75rem 1rem; margin: 1.25rem 0; }

/* ---- results, JSON, timeline --------------------------------------------------------------------------------- */
.json-pair { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 32rem), 1fr)); gap: 1.5rem; }
/* Three panels are a whole span plus its begin and end: the span takes the first row, the pair sit together below it. */
.json-pair > div:first-child:nth-last-child(3) { grid-column: 1 / -1; }
.json-pair > div:first-child:nth-last-child(3) ~ div h3::before { content: ""; display: inline-block; width: 0.9rem; height: 0.6rem; margin-right: 0.5rem; vertical-align: 1px; background: var(--ok); }
.json-pair > div:first-child:nth-last-child(3) ~ div:last-child h3::before { background: var(--bad); }
.result h2 { border: none; padding-top: 0; }
.result h2 .muted { display: block; font-size: 0.95rem; font-weight: 400; letter-spacing: 0; margin-top: 0.4rem; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1.25rem; margin: 1rem 0; }
dl.kv dt { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); padding-top: 0.2rem; }
dl.kv dd { margin: 0; }
dl.kv dt a.term, .result h2 a.term { color: inherit; text-decoration: underline dotted; text-decoration-color: var(--muted); text-decoration-thickness: 1px; text-underline-offset: 3px; }
dl.kv dt a.term:hover, .result h2 a.term:hover { color: var(--accent); text-decoration-color: var(--accent); }
ul.notes { color: var(--muted); font-size: 0.95rem; }
.timeline { position: relative; height: 3.5rem; margin: 1rem 0 1.75rem; background: var(--panel); }
.timeline .bar { position: absolute; top: 0.6rem; height: 1rem; background: var(--accent); }
.timeline .bar-begin { top: 1.8rem; background: var(--ok); }
.timeline .bar-end { top: 1.8rem; background: var(--bad); }
.timeline .bar.fringe { background: var(--tint); }
.timeline .bar-begin.fringe { background: color-mix(in srgb, var(--ok) 22%, var(--panel)); }
.timeline .bar-end.fringe { background: color-mix(in srgb, var(--bad) 22%, var(--panel)); }
.timeline .bar.open-start { mask-image: linear-gradient(to right, transparent, #000 60%); }
.timeline .bar.open-end { mask-image: linear-gradient(to left, transparent, #000 60%); }
.timeline .bar.open-start.open-end { mask-image: linear-gradient(to right, transparent, #000 40%, #000 60%, transparent); }
.timeline-key { font-size: 0.8rem; margin: 0 0 1.75rem; display: flex; flex-wrap: wrap; gap: 0.4rem 1.25rem; }
.timeline-key .swatch { display: inline-block; width: 0.9rem; height: 0.6rem; vertical-align: -1px; margin-right: 0.35rem; background: var(--accent); }
.timeline-key .swatch.begin { background: var(--ok); }
.timeline-key .swatch.end { background: var(--bad); }
.timeline-key .swatch.fringe { background: var(--tint); }
.timeline .axis-start, .timeline .axis-end { position: absolute; bottom: -1.4rem; font-size: 0.8rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.timeline .axis-end { right: 0; }

/* ---- trainer forms ------------------------------------------------------------------------------------------- */
form.stack { display: flex; flex-direction: column; gap: 0.9rem; margin: 1.5rem 0; }
form.stack label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
form.stack label.grow { flex: 1; }
form.stack input[type=text], form.stack textarea, form.stack select { font-size: 1rem; text-transform: none; letter-spacing: 0; font-weight: 400; }
form.stack .row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: flex-end; }
/* A row of actions outside a form, such as the trainer's export buttons: each button is its own small form. */
.row:not(form.stack .row) { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; margin: 1rem 0; }
.row > form { margin: 0; }
.preview { min-height: 1.5rem; }
.preview pre { max-height: 14rem; }

@media (max-width: 760px) {
  header.top { padding: 1.25rem 1rem 0.75rem; }
  header.top .search { margin-left: 0; width: 100%; }
  header.top input[type=search] { width: 100%; min-width: 0; }
  main { padding: 1.75rem 1rem 4rem; }
  .hero { margin: -1.75rem -1rem 2rem; padding: 2.25rem 1rem 2rem; }
  pre { font-size: 0.85rem; }
}